2👍
✅
Can you try to create dynamic values
const lineData = [
{ x: 0, y: 2 },
{ x: 10, y: 3 },
{ x: 20, y: 10 },
{ x: 30, y: 20 },
{ x: 40, y: 35 },
{ x: 50, y: 50 },
{ x: 60, y: 65 },
{ x: 70, y: 80 },
{ x: 80, y: 90 },
{ x: 90, y: 97 },
{ x: 100, y: 98 },
];
const xValue = 70;
let key = Math.floor(xValue / 10);
let diff = (lineData[key + 1].y - lineData[key].y) / 10;
let toAdd = (xValue - lineData[key].x) * diff;
const yValue = lineData[key].y + toAdd;
And include dynamic values in chartJs code
new Chart(
document.getElementById('lineChart'), {
type: 'line',
data: {
datasets: [
{
data: lineData,
startWithZero: true,
fill: false,
lineTension: 0.3,
borderColor: 'blue',
}
]
},
options: {
bezierCurve : true,
lineTension: 0.3,
tooltips: {
mode: 'intersect'
},
scales: {
xAxes: [{
type: 'linear',
ticks: {
min: 0, //minimum tick
max: 100, //maximum tick
},
}],
yAxes: [{
ticks: {
bezierCurve : true,
min: 0, //minimum tick
max: 100, //maximum tick
},
bezierCurve : true,
type: 'linear',
lineTension: 0.3,
scaleLabel: {
lineTension: 0.1,
display: true,
}
}]
}
}
})
const lineData = [
{ x: 0, y: 2 },
{ x: 10, y: 3 },
{ x: 20, y: 10 },
{ x: 30, y: 20 },
{ x: 40, y: 35 },
{ x: 50, y: 50 },
{ x: 60, y: 65 },
{ x: 70, y: 80 },
{ x: 80, y: 90 },
{ x: 90, y: 97 },
{ x: 100, y: 98 },
];
const xValue = 70;
let key = Math.floor(xValue / 10);
let diff = (lineData[key + 1].y - lineData[key].y) / 10;
let toAdd = (xValue - lineData[key].x) * diff;
const yValue = lineData[key].y + toAdd;
new Chart(
document.getElementById('lineChart'), {
type: 'line',
data: {
datasets: [
{
data: lineData,
startWithZero: true,
fill: false,
lineTension: 0.3,
borderColor: 'blue',
}
]
},
options: {
bezierCurve : true,
lineTension: 0.3,
tooltips: {
mode: 'intersect'
},
scales: {
xAxes: [{
type: 'linear',
ticks: {
min: 0, //minimum tick
max: 100, //maximum tick
},
}],
yAxes: [{
ticks: {
bezierCurve : true,
min: 0, //minimum tick
max: 100, //maximum tick
},
bezierCurve : true,
type: 'linear',
lineTension: 0.3,
scaleLabel: {
lineTension: 0.1,
display: true,
}
}]
}
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.8.0/Chart.min.js"></script>
<body>
<div style="width: 750px; height: 250px; margin: 0 auto;">
<canvas style="width: 750px; height: 250px" id="lineChart"></canvas>
</div>
</body>
Source:stackexchange.com